TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2581 SUBJECT: GRB040422: optical observations at Xinglong Observatory DATE: 04/04/25 17:55:22 GMT FROM: Yulei Qiu at Nat.Astro.Obs.of China Y.Qiu and J.Hu (NAOC) report: We observed the erro box of GRB040422 with the 0.8 m telescope at Xinglong Observatory, National Astronomical Observatories of China, at 18.24 UT April 22. Four unfiltered images were taken with exposure time 300s. Comparing with DSS-II image, we couldn't find any new source in the combined image. The limiting magnitude of the combined image is about 20.0. This message may be cited.